Donkey Mong

Donkey Mong is an ultra-rare monster that spawns in the south-western part of Eridium Blight. You will enter this area automatically during a story mission. He looks like one of the common Bedrock Bullymogs, but throws explosive barrels at you.

Donkey Mong has only one single spawn point. However, he spawns very rarely. There is a trick to making him appear. Enter the Eridium Blight from Hyperion Circle of Slaughter, and go straight to his spawn point. This is a guaranteed method. He can spawn at any time though. You do not have to kill any other monster in this area to make him spawn. Your XP level does not matter either.Travel back and forth between Arid Nexus - Boneyard and Eridium Blight and check out his location each time. It can take some while to make him spawn - maybe 5 minutes; maybe 2 hours.

Use a vehicle if you are not level 30 yet. He can be a pretty rough enemy otherwise.